Sometimes I have heat & sometimes I don't. Also with it overheating. I can drive a total of 5 miles till I loose heat & starts to overheat. I have replaced the thermastat & got a new radiator cap. Done a do it yourself flushing system. With still these problems. I am thinking my water pump is not having enough power or my temp control module is out. I'm almost certain its not a blown gasket. I'm not loosing any fluid, oil looks good. If anyone has any other ideas or tips to try please let me know.

 

Could be water pump and/or clogged radiator and/or clogged heater core.